Table 2.

Health-related quality of life according to variables of interest at baseline (2009)

	Total	Unweighted %	Weighted %	Health-related quality of life (EQ-VAS)			p value
				Unweighted Mean	Weighted Mean	SD
Gap between income and subjective social class							<0.0001
HH	2,263	18.3	20.2	76.77	77.00	14.28
HM	838	6.8	7.5	74.78	75.30	15.11
HL	645	5.2	5.7	73.09	73.56	17.46
MH	1,493	12.1	12.6	75.39	75.57	14.99
MM	1,061	8.6	9.0	73.85	74.06	14.63
ML	1,605	13.0	13.3	71.74	72.34	16.51
LH	1,069	8.7	7.6	72.84	73.26	15.08
LM	854	6.9	6.3	69.79	70.52	15.45
LL	2,522	20.4	17.7	64.24	65.12	17.24
Gap between education and subjective social class							<0.0001
HH	2,276	18.4	20.8	77.08	77.22	14.65
HM	954	7.7	9.0	76.18	76.44	14.99
HL	870	7.0	8.2	74.03	74.44	16.93
MH	1,562	12.7	13.0	76.11	76.15	14.22
MM	987	8.0	8.3	73.38	73.41	14.49
ML	1,485	12.0	12.6	71.66	71.99	17.02
LH	987	8.0	6.7	70.77	70.99	14.96
LM	812	6.6	5.5	68.37	68.79	15.12
LL	2,417	19.6	15.9	63.50	63.93	16.71
Income							<0.0001
Low	4,445	36.0	31.7	67.38	68.15	16.74
Medium	4,159	33.7	34.9	73.59	73.95	15.57
High	3,746	30.3	33.4	75.69	76.03	15.12
Subjective social class							<0.0001
Low	4,772	38.6	36.8	67.96	69.05	17.44
Medium	2,753	22.3	22.8	72.87	73.50	15.15
High	4,825	39.1	40.5	75.47	75.85	14.75
Education							<0.0001
≤ Middle school	4,216	34.1	28.1	66.14	66.56	16.26
High school	4,034	32.7	33.9	73.80	73.94	15.49
≥ College	4,100	33.2	38.0	76.22	76.43	15.28
Total	12,350	100.0	100.0	71.99	72.81	16.21

EQ-VAS EuroQol-visual analogue scale, HH High–High, HM High–Medium, HL High–Low, MH Medium–High, MM Medium–Medium, ML Medium–Low, LH Low–High, LM Low–Medium, LL Low–Low